limestone adder's-tongue

Ophioglossum engelmannii belongs to the family Ophioglossaceae and is part of the genus Ophioglossum. It was first described in 1883 by Prantl. The species is distributed across multiple regions, including Alabama, Arizona, Arkansas, Costa Rica, Florida, Georgia, Honduras, Illinois, Indiana, Kansas, Kentucky, Louisiana, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Mississippi, Missouri, Nebraska, and others. This fern is adapted to calcareous environments and is commonly found in dry, open habitats such as barrens and glades.